Is this feisible w/Gradle

Have a gradle project just for documentation where we have several hundred asciidoctor encoded textfiles. We use the gradle plugin to invoke asciidoctor xlate them to html in our /webapp folder. Works fine.

Gradle used to have a -t switch on cmd line to ask gradle to lurk about until something needs 2B done.
As i dont want to re-xlate ALL docs just b/c of updating a few files, can i expect gradle 3.4 to hang around looking for things to do or do i need a setting to make this happen?

See continuous build and incremental tasks